Work-holding attachment.



No. 814,366. PATENTED MAB.. 6, 1906. A. FERTIG Sz R. T. KNLL. WORK HOLDING ATTACHMENT.

unanimi FILED und, 1904.

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UNITED STATES PATENT OFFICE.

ADAM FERTIG AND RICHARD T. KNOLL, OF NEW YORK, N. Y.

WORK-HOLDING ATTACHMENT.

Specicaton of Letters Patent.

Patented March 6, 1906.

To all whom t may concern:

Be it known that we, ADAM FERTIG and RIOHaRD T. KNOLL, citizens of the United States, residing in Manhattan borough, city of New York, county of New York, and State of New York, have invented a certain new and' useful Work-Holding Attachment, of which the following is a specification.

This invention relates to means for holding the work upon the beds or platens of planing machines, millingmachines, shaping-machines, &c.

The principal object of the invention is to increase the efficiency of work-holding attachrnents of this character and enlarge the sco e of their operations.

eretofore it has been proposed to pivot two plates to ether, secure one of them to the bed of a aner or the like, and then secure the worlii) upon the other plate, so that the work may be adjusted to different angles. By our invention the work-holding plate is so mounted that it may be swunr to either side of the bed-plate and stanclat right angles therewith or to a position overlying said plate and parallel therewith or to.

any intermediate position, the work-holding plate alwa s standing or lying wholly outside of the edlate, so as to permit freedom of movement o the sha ing or cutting tool which acts upon the wor Thus a piece of work ma be machined upon three sides at right ang es to each other when desired simpy by adjusting the Work-holding plate.

oles may also be drilled in the work at right angles to one another. It is usual in attachments of this kind to employ a square, bevel, or other instrument in order to set the Work-holding plate to the proper angle; but by our invention this objection is overcome and it is rendered practicable to handle the Work and set it with precision and without loss of time. A ain, our work-holder may be used with faci Vity in planing or cutting a cylindrical contour upon the work or in making a tapering out and without the necessity of loosening the work-holder from the machine or the work from the Work-holder.

In the accompanying drawings, Figure 1 is a plan, Fig. 2 a side elevation, and Fi 3 an end elevation, of a work-holdin attac ment constructed in accordance wit our invention. In these figures the Work-holding plate is illustrated as standing at right angles with the base; but at Fig. 3 the work-holding plate is shown in dotted lines as turned to a position parallel with the base-plate or bed.

In the views like parts are identified by like signs.

The invention comprises two main parts hinged together-viz., a base-plate or bed l, havin a plane bottom 2 for resting upon the bed 0% a machine, and preferably a central guide-rib 3 for insertion into the grooves usuall provided in the machine-bed and a workho ding late 4, having T- ooves, some extending ongitudinally of t e late, as at 5, and others transversely thereo as at 6, said grooves being oi' ordinary type and adapted to retain the clamps, whereby the work may be held upon the work-hdlding late. Said main parts are hin ed together y means of a longitudinal shaigt or pintle 7, preferably fixed ln'bearings cast upon the work-holding plate 4, three such bearings bein shown in this instance, two at the ends cig the plate and designated as 8 and 9 and one intermediate bearing 10. The shaft 7 turns in bearings ll, l2, and 13, cast upon the base-plate l, the bearings 11 and 13 confining bearin s 8 and 9 to prevent endwise play of the wor holding plate 4 and the intermediate bearing l2 being contiguous to the bearing l0. By this construction an ample support is afiorded :for all parts of the work-holding plate 4 and great r1 idity is assured, it being important that t e work held upon the device should not yield when subjected to the action of the cutting-tool.

It will be observed that the work-holding and base plates 1 and 4 are hinged back to back and that the work-holding plate ma be turned to a position at ri ht angles witl the base-plate 1 at either si e of the latter, one such position being shown in full lines in the drawings. Hence a iece of work that is clamped upon said workolding plate may be planed upon its top and bottom edges bysimply planing one edge, turning the work-holdmg late over to the other side, and then planing the other edge of the work, and said edges will be exactly parallel. This may be done Without taking the Work off from the VVwirerle-holder or removing the latter from the machine or even disturbing its position. It will also be seen at Fi 3 by the dotted outline` that the Workolding plate may be turned into parallelism with the bed or baseplate 1, and hence a cut may be taken upon the work that will be at yexact right angles with the said edge cuts.

In order to enable the greatest degree of accuracy of adjustment, an index 14 may be provided u on the Work-holding late and a curved sca e 15 upon the base-p ate 1, said scale being preferably marked along the edge of a sector 16, that forms an extension of the bearing 11, said sector being preferably cast in one piece with the base-plate 1. The principal function of the sector, however, is to enable the Work-holding plate 4 to be fastened at any angle to which it may be turned, and to.this end said sector is rdvided with a curved slot 17 concentric with3 the hinge-pintle 7, and a bolt 18, Fig. 1, projects from the bearing 8 through said slot and carries a han dle-nut 19, Whereb the sector and the bearing 8 are clampedr together when desired. Preferably an additional sector 20 is provided at the opposite end of the base upon the bearing 13, the bearing 9 being provided With locking-bolt` 1 and handle-nut 22 to correspond with akirved slot similar to 17, formed in the seco A20. It will be understood that by clampiJgI-,he hinged members together at both ends aver hlgh degree of rigidity may be secured. The outer faces of the bearings 8 and 9 of ther YOrk-holding plate 4 have bearings against the nner faces of the sectors, thus giving an extensive clampingsurface, and, if desired, the edges or peripheries of the sectors may be finished concentrically With the hinge-pintle 7 to fit concave bearing-surfaces 23, formed upon the members 8 and 9, thereb giving additional sup' port to the Work-ho ding late.

Upon a projecting end ofthe pintle or shaft 7 is preferably secured a Worm Wheel or gear 24, with which meshes a Worm 25, the latter being fixed upon a shaft 26, mounted in bearings 27 28 and provided with a squared end 29 to fit a ke whereby fine adjustments of the work-hol ing plate may be effected. The bearin 27 is adjustably secured u on the outer ace of the bearing 11, so t at the Worm-shaft 26 may be adjusted up or down to effect an accurate fit between the Wormand Worm-Wheel. After adjustment of said bearing 27 it is secured by means of bolts 30. Y In operation the baselate 1 may be secured upon the bed of t e machine by the employment of ordinary clamps. The handle-nuts are loosened to release the Workholding plate 4, and the shaft 26 is then rotated 1n either direction to turn the Workholding plate in the required direction to reach the desired ositon or angle, which may be determine b consulting the scale and index. The hand e-nuts are then tightened. The Work may be secured upon the Work-holding plate either before or after ad- `ustment of the latter h ordinary devices.

hen it is desired to ma e a cylindrical cut, the hand-nuts are not clamped; but the Work-holder plate 4 is kept under control by means of the key that is fitted on. the squared end 29 of the Worm-shaft. The cutting-tool operates in the usual manner; but after each cut the operator turns thc worm a trifie, thereby effecting a slight rotation of the Workholding plate, together with the work thereon, so that gradually a cylindrical cut is made. The worm and Worin-Wheel are suffi'- cient to hold the Work-holding plate properly for such Work and in other cases also, if re- ?uired, although generall the additional astening devices describe will be found of great advantage. In making a cylindrical cut the axis 7 of the Work-holder is of course placed parallel with the path of the cuttingtool, and the cut that is made is of course concentric to said axis 7. In making a tapering cut, however, the axis 7 is set to a suitable angle With the ath of the cutting-tool.

By simply rotating t e Work-holding plate as the cuts are made a tapering cut may be made with facility.

Heretofore When it has been desired to machine a piece of Work in parallelism with the base of the Work-holding attachment it has been necessary after securing the attachment upon the planing-machine to employ a suitable instrument to compare the oppo site sides of the Work-holding plate to see if they were at equal distances from the bed of the planin -machine, and if found not to be true it has een necessary to loosen the Workholding plate, reset it, resecure it, and remeasure it, this train of operations bein re eated until the Work-holding plate is true y our invention, however, it is onl f necessary to turn the crank-shaft 26 unti the index 14 points to the to graduation on the scale and then turn the c amps 19 22.

It Will be seen that a piece of Work in roug( condition may be secured upon the wor holder and machined angularly upon its edges and shaped upon its top ortion either Hat, c Ylindrical, or tapering, an all Without taking the Work off from the Work-holder, which is a great advantage. At the same time the Work produced is true in every Way, while the various adjustments may be made quickly and with precision and Without re eated trials.

Variations may be resorte to Within the scope of the invention-as, for instance, the sectors may be mounted or cast upon the Work-holding plate and the bolts and handlenuts secured to the bed, and portions of the improvements ma be used without othersas, for instance, t e rib or tongue 3 may be omitted, especially if it is desired to set the Work-holder at odd angles upon the bed of the machine.

IOO

Having thus described our invention, We claim- 1. A Work-holding attachment comprising two plates hinged beek to beek, one of said. plates being provided with work holding means and being broader than the other, and being movable upon the hinge to a position alongside of the other upon either side there of, in which position the edge of" the workholding?r plete is lliisli with the bottom surfece of the other plete sind ineens for festem ing the Work-holding plate where adjusted; whereby the position of the work-holding plete for making right-angle cuts upon either side of the Work may be mechanically determined by setting said plate with either edge down upon the bed of the machine.

2. A Work-holding attachment comprising two plates hinged beek to beek, one of said plates bein provided with work-holding means land eing broeder than the other, and being movable upon the hinge to a position alongside of the other upon either side thereof, in which position the ed e of the Workholdinf plate is flush with ie bottoni surfoce o the other plate; means for fastening the work-holding plete Where adjusted; and micrometer mechanism, including e worin :ind screw, for adjusting said Work-holding plate.

ADAM FERTIG.

RICHARD T. KNOLL.

TWitnesses:

EDWARD A. MOGLIE, ABNER B. STUPEL. 

